Note 10 - Fair Value Measurements - Recurring Fair Value Measurements (Details) - Fair Value, Recurring [Member] - USD ($) $ in Thousands	Jun. 30, 2026	Mar. 31, 2026
Commodity futures – financial liabilities, net	$ (983)	$ (273)
Contingent consideration for business combination - financial liability	(2,160)	(2,160)
Total	(3,143)	(2,433)
Fair Value, Inputs, Level 1 [Member]
Commodity futures – financial liabilities, net	(983)	(273)
Contingent consideration for business combination - financial liability	0	0
Total	(983)	(273)
Fair Value, Inputs, Level 2 [Member]
Commodity futures – financial liabilities, net	0	0
Contingent consideration for business combination - financial liability	0	0
Total	0	0
Fair Value, Inputs, Level 3 [Member]
Commodity futures – financial liabilities, net	0	0
Contingent consideration for business combination - financial liability	(2,160)	(2,160)
Total	$ (2,160)	$ (2,160)